G2

Zach N.

Product Manager

Small-Business (50 or fewer emp.)

10/16/2026

"It Just Works—Reliable Experience with TINCheck"

5/5

What do you like best about TINCheck?

Not to be too simplistic, but it does what it says on the... (drumroll) TIN. We have a set of tax information from customers that get entered and we are able to pretty seamlessly pipe in that data using the TIN API calls and communicate those results to customers. Huge win for them to have their vendor's tax info validated Review collected by and hosted on G2.com.

What do you dislike about TINCheck?

Rate limiting, which I believe is done not by TINCheck but by the IRS, can sometimes be a bit painful. We were able to implement caching on our side to group and limit and speed up the calls we make on our side, but my understanding is that this is not a TIN Check limitation, but a limitation of the core API the IRS offers Review collected by and hosted on G2.com.

Recommendations to others considering TINCheck:

If you have a use case for validating TINs, I can't really imagine a better service to use. Review collected by and hosted on G2.com.

What problems is TINCheck solving and how is that benefiting you?

We're able to automatically validate the TINs customers have for their vendors using this service. We have a set of tax information from customers that get entered and we are able to pretty seamlessly pipe in that data using the TIN API calls and communicate those results to customers. Huge win for them to have their vendor's tax info validated Review collected by and hosted on G2.com.